diff --git a/life_cycle_costs.py b/life_cycle_costs.py
new file mode 100644
index 0000000..fd3af0a
--- /dev/null
+++ b/life_cycle_costs.py
@@ -0,0 +1,56 @@
+"""
+LifeCycleCosts calculates the life cycle costs of one building
+SPDX - License - Identifier: LGPL - 3.0 - or -later
+Copyright © 2022 Project Author Pilar Monsalvete Alvarez de Uribarri pilar_monsalvete@concordia.ca
+"""
+import math
+
+
+class LifeCycleCosts:
+
+  # todo: this should be (city, costs_catalog) or similar
+  def __init__(self, building, number_of_years, consumer_price_index, discount_rate, end_of_life_cost,
+               capital_costs_at_year_0, items, fuels, concepts):
+    self._building = building
+    self._number_of_years = number_of_years
+    self._consumer_price_index = consumer_price_index
+    self._discount_rate = discount_rate
+
+    self._end_of_life_cost = end_of_life_cost
+
+    self._capital_costs_at_year_0 = capital_costs_at_year_0
+    self._items = items
+
+    self._fuels = fuels
+
+    self._concepts = concepts
+
+  def calculate_capital_costs(self):
+    total_capital_costs = self._capital_costs_at_year_0
+    for year in range(1, self._number_of_years + 1):
+      costs_increase = math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
+      for item in self._items:
+        total_capital_costs += item.reposition_costs[year] * costs_increase
+    return total_capital_costs
+
+  def calculate_end_of_life_costs(self):
+    price_increase = 0
+    for year in range(1, self._number_of_years + 1):
+      price_increase += math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
+    return self._end_of_life_cost * price_increase
+
+  def calculate_total_operational_costs(self):
+    total_operational_costs = 0
+    for year in range(1, self._number_of_years + 1):
+      for fuel in self._fuels:
+        total_operational_costs += fuel.operational_cost \
+                                   * math.pow(1 + fuel.energy_price_index, year) / math.pow(1 + self._discount_rate, year)
+    return total_operational_costs
+
+  def calculate_total_maintenance_costs(self):
+    total_maintenance_costs = 0
+    for year in range(1, self._number_of_years + 1):
+      costs_increase = math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
+      for concept in self._concepts:
+        total_maintenance_costs += concept.mantainance_costs * costs_increase
+    return total_maintenance_costs
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..070aa0e
--- /dev/null
+++ b/main.py
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+"""
+Costs Workflow
+SPDX - License - Identifier: LGPL - 3.0 - or -later
+Copyright © 2022 Project Author Pilar Monsalvete Álvarez de Uribarri pilar.monsalvete@concordia.ca
+"""
+
+from pathlib import Path
+from imports.geometry_factory import GeometryFactory
+from life_cycle_costs import LifeCycleCosts
+
+gml_file = 'city.gml'
+file = Path(gml_file).resolve()
+city = GeometryFactory('gml', file).city
+
+number_of_years = 40
+consumer_price_index = 0.1
+
+for building in city.buildings:
+  lcc = LifeCycleCosts(building, number_of_years, consumer_price_index, costs_catalog)
+  total_capital_costs = lcc.calculate_capital_costs()
+  end_of_life_costs = lcc.calculate_end_of_life_costs()
+  total_operational_costs = lcc.calculate_total_operational_costs()
+  total_maintenance_costs = lcc.calculate_total_maintenance_costs()
+  life_cycle_costs = total_capital_costs + end_of_life_costs + total_operational_costs + total_maintenance_costs
+
+  print(f'Building name: {building.name}')
+  print(f'Capital costs: {total_capital_costs}')
+  print(f'End of life costs: {end_of_life_costs}')
+  print(f'Operational costs: {total_operational_costs}')
+  print(f'Maintenance costs: {total_maintenance_costs}')
+  print(f'Life cycle costs: {life_cycle_costs}')